But that didn't stop McGregor's coach John Kavanagh from adding fuel to the fire. The longtime Straight Blast Gym leader tweeted this photo and a not-so-subtle caption that surely sent some overzealous fight fans into a frenzy.

A video posted by Floyd Mayweather (@floydmayweather) on May 1, 2016 at 1:26pm PDT

McGregor was recently pulled from UFC 200 after a dispute with the UFC over his participation in a promotional tour. UFC president Dana White, however, said that though McGregor won't be fighting at 200, he'll likely return for UFC 201 or UFC 202.

When McGregor said he'd retired during his spat with the UFC, Kavanagh played along as well, tweeting "it was fun while it lasted."

So while it's fun to fantasize about a potential match between McGregor and Mayweather, Kavanagh's troll job should be further indication that it's just not happening ...